Screenings have revealed elevated lead and copper levels in at six of 15 public schools in the Detroit suburb of Grosse Pointe.

The school district on Monday released results of samples collected when water was turned on and after water was left running for two minutes.

The district says testing was done at the end of March. Ten of 130 samples exceeded federal standards. Water fountains above the federal action level were disconnected.

The testing was prompted by the crisis in Flint, where lead flowed from taps after state authorities switched the city's water supply from Detroit's system to the Flint River to save money.

Detroit Schools said last week that elevated levels of lead and copper were found in water fountains or kitchens at 19 of 62 schools tested.